Just found this necklace that looks like a coin. The front appears to have 4 heads on it and the back appears to have ridges around the edge and writing on it. All help would be appreciated.
Not sure if those resemble "Titans of Industry" so much as Civil War generals. The fellow at bottom could well be Lee, and the crisp collars one can make out just seem like military uniforms. Could it be some kind of 50th or 75th Anniversary commemorative medal of the war, or of some notable battle like Gettysburg? That would date the medal from the teens or thirties, which seems about right given the general style (pun intended).
I'd say that find might be a prime candidate for electrolysis or a "molasses bath".